<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>外部css样式</title>

  <link rel="stylesheet" href="./h2.css">

</head>

<body>

  <div class="c1" >
    使用外部css样式
  </div>




</body>

</html>